Replies to postings are repeating

Some more data:

On two PCs and an iPad, we are getting the following. When clicking Replies on the first message here, where it says there are six replies, I only get four of them (see below). Clicking replies elsewhere on the page does nothing. This is true for Safari (iPad), and Chrome, IE, and Firefox (2 PCs). What is going on? The only thing these things share (other than your site, of course) is a Verizon FIOS Router, that is about two years old. Could Verizon be screwing with our data??? Is anyone else reporting this?